James Maddison is expected to be confirmed as a Leicester City player on Tuesday in a deal worth £22m, Sky Sports News understands.
Maddison passed a medical on Monday and has agreed personal terms on a long-term deal.
The transfer fee is expected to rise to £24m with add-ons for the 21-year-old midfielder.
Southampton are believed to head a group of teams including Fulham, Everton and West Ham who were keen to sign Maddison.
He has also been scouted by top-four clubs Tottenham, Liverpool and Manchester City.
Maddison scored 15 goals last season and, with their parachute payments due to end this year, Norwich have been willing to cash in on their most valuable player.
Norwich have been seeking between £20m and £25m for Maddison, who has represented England at U21 level.
Source: Skysports